Thai rubber farmers have called off demonstrations planned for the weekend after the government's decision on Tuesday to double its production subsidy offer.

The government has promised a subsidy that should lift farmers' income to around 90 baht, or $US2.80 per kilogram - a rise of little more than 12 per cent.

A farmer's leader, Amnuay Yutitham, says demonstrators are satisfied with the government subsidy offer.

"We can tell you for sure now there will be no protest this weekend," he said.

Mr Yutitham represents farmers from 16 southern provinces.

Tens of thousands of rubber farmers, angered by a steep fall in rubber prices, have blocked roads, railways and pelted police with rocks over the past two weeks.

The prime minister's deputy secretary-general, Tawat Boonfueng, who has led negotiations for the government side, has further offered help for people arrested in protests last week that threatened to paralyse large parts of southern Thailand.

"Although no one can be above the law, we could help those who were arrested with financial assistance during their trial, and those who were injured," he said.

Rubber farmers are resentful that rice farmers in the north are receiving large subsidies to offset their low prices.

Thailand is the world's largest rubber exporter, but the farmers who tap the trees on plantations in the country's south are bearing the brunt of a global slump.

Rubber prices have roughly halved over the past two years, with experts blaming overproduction across South-East Asia.